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GB/T 28987-2012: Standard methods for development of characteristic mechanical values for structural lumber
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 28987-2012 | English | 209 |
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Standard methods for development of characteristic mechanical values for structural lumber
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GB/T 28987-2012
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Basic data | Standard ID | GB/T 28987-2012 (GB/T28987-2012) | | Description (Translated English) | Standard methods for development of characteristic mechanical values for structural lumber | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B69 | | Classification of International Standard | 79.040 | | Word Count Estimation | 9,999 | | Quoted Standard | GB/T 1931; GB/T 1933; GB 50005; ASTM D1990 | | Regulation (derived from) | National Standards Bulletin No. 41 of 2012 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the strength properties of the corresponding eigenvalues ??establish standard procedures and steps, including sample material specifications, test methods and data analysis methods. This standard applies to our domestic species or | GB/T 28987-2012: Standard methods for development of characteristic mechanical values for structural lumber
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Standard methods for development of characteristic mechanical values \u200b\u200bfor structural lumber
ICS 79.040
B69
National Standards of People's Republic of China
Structural Test Method Specification material characteristic values
Issued on. 2012-12-31
2013-06-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
Please note that some of the content of this document may involve patents. Release mechanism of the present document does not assume responsibility for the identification of these patents.
This standard was proposed by the State Forestry Administration.
This standard by the National Standardization Technical Committee of timber structures Wood Technical Committee (SAC/TC41/SC4) centralized.
This standard was drafted. Chinese Academy of Forestry Wood Industry Research Institute, Suzhou Royal overall residential system Co., Ltd., Zhejiang
Jiangsu Province Nanxun Wood Products Quality Inspection Center detection, Sino-board industry (China) Investment Co., Ltd., Diamond Wood China Limited.
The main drafters of this standard. Ren Haiqing, Lv Jianxiong Yin Armenia, Chun Ni, Zhou Haibin, Luo Xiuqin, Jiang Jinghui, HONGKONG, Bin Shen Hua
Li Shihua, Zhuqi Min.
Structural Test Method Specification material characteristic values
1 Scope
This standard specifies the establishment of corresponding strength properties of the eigenvalues \u200b\u200bof standard procedures and steps, including lumber sampling, test methods and data points
Analytical methods.
This standard applies to our domestic or imported species logs and sawn timber from the processing of lumber.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 1931 Method for determination of moisture content of wood
GB/T 1933 Wood Density Determination
GB 50005 design of timber structures
Standard method allows properties ASTMD1990 intensity level through full scale test specimens to establish visual grading of dimension lumber
(StandardPracticeforestablishingalowablepropertiesforvisualy-gradeddimensionlumberfromin-
Gradetestsofful-sizespecimens)
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Lumber dimensionlumber
Required by the light wood design, width and height of the timber sections of predetermined size normalization processing timber.
3.2
Eigenvalues \u200b\u200bcharacteristicvalue
A bit value of the material properties of the probability distribution of quality compliance. This standard is a specification of mechanical properties of materials at 75% confidence interval
5% quantile value as the mechanical properties of the corresponding eigenvalues, and the average flexural modulus of elasticity as its eigenvalues.
3.3
The maximum decrease in strength defect themaximumstrength-reducingdefects
Timber strength caused by natural or minimizes the processing defects, such as knots, cracks, rot, denim processing and the like.
3.4
Growing area growthregion
Depending on climatic conditions, soil conditions, the scope of the similar nature of the same species or species growth is divided into different areas of the standard
Registration of growing regional requirements cover all areas of the growing species or species combinations.
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